Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » thieu nien, hieu tieng, nhieu viec
hieu hien » bieu hien, dieu hien, chieu chien
hanh dai » hanh tai, hanh dao, vanh dai
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang x ho. ((((hieu vien) OR (hieu viec))) or (hieu hien)) cac tuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang x ho. ((((hieu vien) OR (hieu viec))) OR (hieu hien)) cac tuc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang x ho. ((((hieu vien) OR (hieu viec))) or (hieu hien)) cac tuc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang x ho. ((((hieu vien) OR (hieu viec))) or (hieu hien)) cac tuc va hanh dai cua tre*.